Display controller for improving display noise, semiconductor integrated circuit device including the same and method of operating the display controller

A display controller for controlling a display device, the display controller comprising:

• image processing logic configured to sequentially read a plurality of input image data via a data bus and process the plurality of input image data;
• a timing generator configured to output a timing control signal;
• a compensation image generator configured to generate and output a compensation image according to the timing control signal;
• a data interface configured to transmit one of the compensation image and the plurality of input image data to the display device based on the timing control signal;
• and
• a register configured to store a frame count enable signal and a frame skip rate,
• wherein the timing generator includes a frame counter configured to count a number of frames of the plurality of input image data and output the timing control signal if a result of counting the number of frames is equal to the frame skip rate in a state in which the frame count enable signal is enabled.